private static void Update(ShaderProgramGL shaderProgram, IEnumerable <NamedStream> namedStreams, bool solutionMode)
{
string ShaderCode(Stream stream)
{
using (var reader = new StreamReader(stream, true))
{
var code = reader.ReadToEnd();
if (solutionMode)
{
code = code.Replace("#ifdef SOLUTION", "#if 1");
}
return(code);
}
}
var count = namedStreams.Count();
if (2 > count)
{
return;
}
foreach (var res in namedStreams)
{
var shaderType = GetShaderTypeFromExtension(Path.GetExtension(res.Name));
var shaderCode = ShaderCode(res.Stream);
shaderProgram.Compile(shaderCode, shaderType);
}
shaderProgram.Link();
}
private static IShaderProgram ShaderProgramImporter(IEnumerable <NamedStream> resources)
{
ShaderProgramGL shaderProgram = new ShaderProgramGL();
Update(shaderProgram, resources);
return(shaderProgram);
}
private static IShaderProgram ShaderProgramImporter(IEnumerable <NamedStream> resources, bool solutionMode, IContentLoader contentLoader)
{
ShaderProgramGL shaderProgram = new ShaderProgramGL();
Update(shaderProgram, resources, solutionMode, contentLoader);
return(shaderProgram);
}
private static void InitShader()
{
const string sVertexShader = @"
#version 130
out vec2 uv;
void main()
{
const vec2 vertices[4] = vec2[4](vec2(-1.0, -1.0),
vec2( 1.0, -1.0),
vec2( 1.0, 1.0),
vec2(-1.0, 1.0));
vec2 pos = vertices[gl_VertexID];
uv = pos * 0.5 + 0.5;
gl_Position = vec4(pos, 0.0, 1.0);
}" ;
const string sFragmentShd = @"#version 430 core
uniform sampler2D image;
in vec2 uv;
void main()
{
gl_FragColor = abs(texture(image, uv));
}" ;
shaderProgram = ShaderLoader.CreateFromStrings(sVertexShader, sFragmentShd);
}
/// <summary>
/// Creates this instance.
/// </summary>
/// <returns></returns>
public TypedHandle <IShaderProgram> Create()
{
var shader = new ShaderProgramGL();
shaders.Add(shader.ProgramID, shader);
return(new TypedHandle <IShaderProgram>(shader.ProgramID));
}
/// <summary>
/// Reads the contents of a file into a string
/// </summary>
/// <param name="shaderFile">path to the shader file</param>
/// <param name="testCompileInclude">should includes be compiled (for error checking) before being pasted into the including shader</param>
/// <returns>
/// string with contents of shaderFile
/// </returns>
/// <exception cref="FileNotFoundException">
/// Could not find shader file '" + shaderFile + "'
/// or
/// Could not find include-file '" + sIncludeFileName + "' for shader '" + shaderFile + "'.
/// </exception>
public static string ShaderStringFromFileWithIncludes(string shaderFile, bool testCompileInclude)
{
string sShader = null;
if (!File.Exists(shaderFile))
{
throw new FileNotFoundException("Could not find shader file '" + shaderFile + "'");
}
sShader = File.ReadAllText(shaderFile);
//handle includes
string sCurrentPath = Path.GetDirectoryName(shaderFile) + Path.DirectorySeparatorChar; // get path to current shader
string sName = Path.GetFileName(shaderFile);
//split into lines
var lines = sShader.Split(new[] { Environment.NewLine }, StringSplitOptions.None);
var pattern = @"^\s*#include\s+""([^""]+)"""; //match everything inside " except " so we get shortest ".+" match
int lineNr = 1;
foreach (var line in lines)
{
// Search for include pattern (e.g. #include raycast.glsl) (nested not supported)
foreach (Match match in Regex.Matches(line, pattern, RegexOptions.Singleline))
{
string sFullMatch = match.Value;
string sIncludeFileName = match.Groups[1].ToString(); // get the filename to include
string sIncludePath = sCurrentPath + sIncludeFileName; // build path to file
if (!File.Exists(sIncludePath))
{
throw new FileNotFoundException("Could not find include-file '" + sIncludeFileName + "' for shader '" + shaderFile + "'.");
}
string sIncludeShd = File.ReadAllText(sIncludePath); // read include as string
if (testCompileInclude)
{
using (var shader = new ShaderProgramGL())
{
try
{
shader.Compile(sIncludeShd, ShaderType.FragmentShader); //test compile include shader
}
catch (ShaderCompileException e)
{
var ce = new ShaderCompileException(e.ShaderType,
"include compile '" + sIncludePath + "'",
e.ShaderLog, sIncludeShd);
ce.Data.Add(ExceptionDataFileName, sIncludePath);
throw ce;
}
}
}
sIncludeShd += Environment.NewLine + "#line " + lineNr.ToString() + Environment.NewLine;
sShader = sShader.Replace(sFullMatch, sIncludeShd); // replace #include with actual include
}
++lineNr;
}
return(sShader);
}
private static void Update(ShaderProgramGL shaderProgram, IEnumerable <NamedStream> namedStreams)
{
var count = namedStreams.Count();
if (2 > count)
{
return;
}
foreach (var res in namedStreams)
{
var shaderType = GetShaderTypeFromExtension(Path.GetExtension(res.Name));
shaderProgram.Compile(ShaderCode(res.Stream), shaderType);
}
shaderProgram.Link();
}
/// <summary>
/// Compiles and links vertex and fragment shaders from strings.
/// </summary>
/// <param name="sVertexShd_">The vertex shader source code string.</param>
/// <param name="sFragmentShd_">The fragment shader source code string.</param>
/// <returns>
/// a new instance
/// </returns>
public static ShaderProgramGL FromStrings(string sVertexShd_, string sFragmentShd_)
{
ShaderProgramGL shd = new ShaderProgramGL();
try
{
shd.FromStrings(sVertexShd_, sFragmentShd_);
}
catch (Exception e)
{
shd.Dispose();
throw e;
}
return(shd);
}
/// <summary>
/// Creates from strings.
/// </summary>
/// <param name="vertexShaderCode">The vertex shader code.</param>
/// <param name="fragmentShaderCode">The fragment shader code.</param>
/// <returns></returns>
public static ShaderProgramGL CreateFromStrings(string vertexShaderCode, string fragmentShaderCode)
{
var vertexShader = CreateShader(ShaderType.VertexShader, vertexShaderCode);
var fragmentShader = CreateShader(ShaderType.FragmentShader, fragmentShaderCode);
var shaderProgram = new ShaderProgramGL();
shaderProgram.Attach(vertexShader);
shaderProgram.Attach(fragmentShader);
if (!shaderProgram.Link())
{
var e = new ShaderLinkException(shaderProgram.Log);
shaderProgram.Dispose();
throw e;
}
return(shaderProgram);
}
private static void Update(ShaderProgramGL shaderProgram, IEnumerable <NamedStream> namedStreams, bool solutionMode, IContentLoader contentLoader)
{
string ShaderCode(Stream stream)
{
using (var reader = new StreamReader(stream, true))
{
var code = reader.ReadToEnd();
if (solutionMode)
{
code = code.Replace("#ifdef SOLUTION", "#if 1");
}
return(code);
}
}
var count = namedStreams.Count();
if (2 > count)
{
return;
}
foreach (var res in namedStreams)
{
var shaderType = GetShaderTypeFromExtension(Path.GetExtension(res.Name));
var shaderCode = ShaderCode(res.Stream);
string GetIncludeCode(string includeName)
{
var resourceName = includeName.Replace(Path.DirectorySeparatorChar, '.');
resourceName = resourceName.Replace(Path.AltDirectorySeparatorChar, '.');
var includeCode = contentLoader.Load <StringBuilder>(resourceName).ToString();
using (var includeShader = new ShaderGL(shaderType))
{
if (!includeShader.Compile(includeCode))
{
var e = includeShader.CreateException(includeCode);
throw new NamedShaderException(contentLoader.Names.GetFullName(includeName), e);
}
}
return(includeCode);
}
var expandedShaderCode = ShaderLoader.ResolveIncludes(shaderCode, GetIncludeCode);
var shader = new ShaderGL(shaderType);
if (shader.Compile(expandedShaderCode))
{
shaderProgram.Attach(shader);
}
else
{
shaderProgram.RemoveShaders(); //clean out whole shader program to avoid double attachments next time
var e = shader.CreateException(shaderCode);
shader.Dispose();
throw new NamedShaderException(res.Name, e);
}
}
if (!shaderProgram.Link())
{
var e = new ShaderLinkException(shaderProgram.Log);
var s = new StringBuilder();
foreach (var ns in namedStreams)
{
s.Append(ns.Name);
s.Append(';');
}
throw new NamedShaderException(s.ToString(), e);
}
}
